[General] Changing particle color if certain condition is reached

Bombacar · July 28, 2015, 14:26

In order to introduce you a little bit my problem, I am working with a molecular dynamics simulation. To visualize the system with Paraview, I read the position and velocity of each particle from a .vtk file like was made in http://diffusionht.blogspot.com/2012...aview-vtk.html. And in order to color the particles I use the sphere glyph filter and I use the "Color by" option following a physical criterion (i.e temperature).

Now my question is: How can I change the color of the particle who reachs certain condition (i.e if x-position is less than certain value, or if force on particle exceed some value)?. I you consider necessary any extra detail or information I could provide you.

Some suggestion or idea? Thanks in advance

Bombacar · August 2, 2015, 12:11

The only viable option to me was add an additional scalar field with 0/1 values for each point, and color following this scalar. The caveat is that I need to modify my .vtk first before perform the visualization

wyldckat · August 21, 2015, 20:14

Quick answer: ParaView has a filter named "Programmable Filter", which requires ParaView to be built with Python integration. This would enable you to create a field on-the-fly. Examples: http://www.paraview.org/Wiki/Python_Programmable_Filter

July 28, 2015, 14:26	Changing particle color if certain condition is reached	#1
Bombacar New Member Bruno Guerrero Join Date: Aug 2014 Posts: 4 Rep Power: 12	In order to introduce you a little bit my problem, I am working with a molecular dynamics simulation. To visualize the system with Paraview, I read the position and velocity of each particle from a .vtk file like was made in http://diffusionht.blogspot.com/2012...aview-vtk.html. And in order to color the particles I use the sphere glyph filter and I use the "Color by" option following a physical criterion (i.e temperature). Now my question is: How can I change the color of the particle who reachs certain condition (i.e if x-position is less than certain value, or if force on particle exceed some value)?. I you consider necessary any extra detail or information I could provide you. Some suggestion or idea? Thanks in advance

August 2, 2015, 12:11	Works but not in a optimal way	#2
Bombacar New Member Bruno Guerrero Join Date: Aug 2014 Posts: 4 Rep Power: 12	The only viable option to me was add an additional scalar field with 0/1 values for each point, and color following this scalar. The caveat is that I need to modify my .vtk first before perform the visualization

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August 21, 2015, 20:14		#3
wyldckat Retired Super Moderator Bruno Santos Join Date: Mar 2009 Location: Lisbon, Portugal Posts: 10,981 Blog Entries: 45 Rep Power: 128	Quick answer: ParaView has a filter named "Programmable Filter", which requires ParaView to be built with Python integration. This would enable you to create a field on-the-fly. Examples: http://www.paraview.org/Wiki/Python_Programmable_Filter